move mkimage.c to scripts, make it compile

2 files changed, 753 insertions, 0 deletions

diff --git a/scripts/Makefile b/scripts/Makefile
index 043a34c8de..5ed6548230 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -12,6 +12,7 @@ hostprogs-$(CONFIG_LOGO)         += pnmtologo
 hostprogs-$(CONFIG_VT)           += conmakehash
 hostprogs-$(CONFIG_PROM_CONSOLE) += conmakehash
 hostprogs-y                      += bin2c
+hostprogs-y                      += mkimage
 hostprogs-y                      += ubootenv
 hostprogs-$(CONFIG_ARCH_NETX)    += gen_netx_image
 
diff --git a/scripts/mkimage.c b/scripts/mkimage.c
new file mode 100644
index 0000000000..ab7d55dc41
--- /dev/null
+++ b/scripts/mkimage.c
@@ -0,0 +1,752 @@
+/*
+ * (C) Copyright 2000-2004
+ * DENX Software Engineering
+ * Wolfgang Denk, wd@denx.de
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifndef __WIN32__
+#include <netinet/in.h>		/* for host / network byte order conversions	*/
+#endif
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <unistd.h>
+
+#if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
+#include <inttypes.h>
+#endif
+
+#ifdef __WIN32__
+typedef unsigned int __u32;
+
+#define SWAP_LONG(x) \
+	((__u32)( \
+		(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
+		(((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
+		(((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
+		(((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
+typedef		unsigned char	uint8_t;
+typedef		unsigned short	uint16_t;
+typedef		unsigned int	uint32_t;
+
+#define     ntohl(a)	SWAP_LONG(a)
+#define     htonl(a)	SWAP_LONG(a)
+#endif	/* __WIN32__ */
+
+#ifndef	O_BINARY		/* should be define'd on __WIN32__ */
+#define O_BINARY	0
+#endif
+
+#include "../include/image.h"
+
+#ifndef MAP_FAILED
+#define MAP_FAILED (-1)
+#endif
+
+char *cmdname;
+
+#include "../include/zlib.h"
+#include "../lib/crc32.c"
+
+//extern unsigned long crc32 (unsigned long crc, const char *buf, unsigned int len);
+
+typedef struct table_entry {
+	int	val;		/* as defined in image.h	*/
+	char	*sname;		/* short (input) name		*/
+	char	*lname;		/* long (output) name		*/
+} table_entry_t;
+
+table_entry_t arch_name[] = {
+    {	IH_CPU_INVALID,		NULL,		"Invalid CPU",	},
+    {	IH_CPU_ALPHA,		"alpha",	"Alpha",	},
+    {	IH_CPU_ARM,		"arm",		"ARM",		},
+    {	IH_CPU_I386,		"x86",		"Intel x86",	},
+    {	IH_CPU_IA64,		"ia64",		"IA64",		},
+    {	IH_CPU_M68K,		"m68k",		"MC68000",	},
+    {	IH_CPU_MICROBLAZE,	"microblaze",	"MicroBlaze",	},
+    {	IH_CPU_MIPS,		"mips",		"MIPS",		},
+    {	IH_CPU_MIPS64,		"mips64",	"MIPS 64 Bit",	},
+    {	IH_CPU_NIOS,		"nios",		"NIOS",		},
+    {	IH_CPU_NIOS2,		"nios2",	"NIOS II",	},
+    {	IH_CPU_PPC,		"ppc",		"PowerPC",	},
+    {	IH_CPU_S390,		"s390",		"IBM S390",	},
+    {	IH_CPU_SH,		"sh",		"SuperH",	},
+    {	IH_CPU_SPARC,		"sparc",	"SPARC",	},
+    {	IH_CPU_SPARC64,		"sparc64",	"SPARC 64 Bit",	},
+    {	IH_CPU_BLACKFIN,	"blackfin",	"Blackfin",	},
+    {	IH_CPU_AVR32,		"avr32",	"AVR32",	},
+    {	-1,			"",		"",		},
+};
+
+table_entry_t os_name[] = {
+    {	IH_OS_INVALID,	NULL,		"Invalid OS",		},
+    {	IH_OS_4_4BSD,	"4_4bsd",	"4_4BSD",		},
+    {	IH_OS_ARTOS,	"artos",	"ARTOS",		},
+    {	IH_OS_DELL,	"dell",		"Dell",			},
+    {	IH_OS_ESIX,	"esix",		"Esix",			},
+    {	IH_OS_FREEBSD,	"freebsd",	"FreeBSD",		},
+    {	IH_OS_IRIX,	"irix",		"Irix",			},
+    {	IH_OS_LINUX,	"linux",	"Linux",		},
+    {	IH_OS_LYNXOS,	"lynxos",	"LynxOS",		},
+    {	IH_OS_NCR,	"ncr",		"NCR",			},
+    {	IH_OS_NETBSD,	"netbsd",	"NetBSD",		},
+    {	IH_OS_OPENBSD,	"openbsd",	"OpenBSD",		},
+    {	IH_OS_PSOS,	"psos",		"pSOS",			},
+    {	IH_OS_QNX,	"qnx",		"QNX",			},
+    {	IH_OS_RTEMS,	"rtems",	"RTEMS",		},
+    {	IH_OS_SCO,	"sco",		"SCO",			},
+    {	IH_OS_SOLARIS,	"solaris",	"Solaris",		},
+    {	IH_OS_SVR4,	"svr4",		"SVR4",			},
+    {	IH_OS_U_BOOT,	"u-boot",	"U-Boot",		},
+    {	IH_OS_VXWORKS,	"vxworks",	"VxWorks",		},
+    {	-1,		"",		"",			},
+};
+
+table_entry_t type_name[] = {
+    {	IH_TYPE_INVALID,    NULL,	  "Invalid Image",	},
+    {	IH_TYPE_FILESYSTEM, "filesystem", "Filesystem Image",	},
+    {	IH_TYPE_FIRMWARE,   "firmware",	  "Firmware",		},
+    {	IH_TYPE_KERNEL,	    "kernel",	  "Kernel Image",	},
+    {	IH_TYPE_MULTI,	    "multi",	  "Multi-File Image",	},
+    {	IH_TYPE_RAMDISK,    "ramdisk",	  "RAMDisk Image",	},
+    {	IH_TYPE_SCRIPT,     "script",	  "Script",		},
+    {	IH_TYPE_STANDALONE, "standalone", "Standalone Program", },
+    {	IH_TYPE_FLATDT,     "flat_dt",    "Flat Device Tree",	},
+    {	-1,		    "",		  "",			},
+};
+
+table_entry_t comp_name[] = {
+    {	IH_COMP_NONE,	"none",		"uncompressed",		},
+    {	IH_COMP_BZIP2,	"bzip2",	"bzip2 compressed",	},
+    {	IH_COMP_GZIP,	"gzip",		"gzip compressed",	},
+    {	-1,		"",		"",			},
+};
+
+static	void	copy_file (int, const char *, int);
+static	void	usage	(void);
+static	void	print_header (image_header_t *);
+static	void	print_type (image_header_t *);
+static	char	*put_table_entry (table_entry_t *, char *, int);
+static	char	*put_arch (int);
+static	char	*put_type (int);
+static	char	*put_os   (int);
+static	char	*put_comp (int);
+static	int	get_table_entry (table_entry_t *, char *, char *);
+static	int	get_arch(char *);
+static	int	get_comp(char *);
+static	int	get_os  (char *);
+static	int	get_type(char *);
+
+
+char	*datafile;
+char	*imagefile;
+
+int dflag    = 0;
+int eflag    = 0;
+int lflag    = 0;
+int vflag    = 0;
+int xflag    = 0;
+int opt_os   = IH_OS_LINUX;
+int opt_arch = IH_CPU_PPC;
+int opt_type = IH_TYPE_KERNEL;
+int opt_comp = IH_COMP_GZIP;
+
+image_header_t header;
+image_header_t *hdr = &header;
+
+int
+main (int argc, char **argv)
+{
+	int ifd;
+	uint32_t checksum;
+	uint32_t addr;
+	uint32_t ep;
+	struct stat sbuf;
+	char *ptr;
+	char *name = "";
+
+	cmdname = *argv;
+
+	addr = ep = 0;
+
+	while (--argc > 0 && **++argv == '-') {
+		while (*++*argv) {
+			switch (**argv) {
+			case 'l':
+				lflag = 1;
+				break;
+			case 'A':
+				if ((--argc <= 0) ||
+				    (opt_arch = get_arch(*++argv)) < 0)
+					usage ();
+				goto NXTARG;
+			case 'C':
+				if ((--argc <= 0) ||
+				    (opt_comp = get_comp(*++argv)) < 0)
+					usage ();
+				goto NXTARG;
+			case 'O':
+				if ((--argc <= 0) ||
+				    (opt_os = get_os(*++argv)) < 0)
+					usage ();
+				goto NXTARG;
+			case 'T':
+				if ((--argc <= 0) ||
+				    (opt_type = get_type(*++argv)) < 0)
+					usage ();
+				goto NXTARG;
+
+			case 'a':
+				if (--argc <= 0)
+					usage ();
+				addr = strtoul (*++argv, (char **)&ptr, 16);
+				if (*ptr) {
+					fprintf (stderr,
+						"%s: invalid load address %s\n",
+						cmdname, *argv);
+					exit (EXIT_FAILURE);
+				}
+				goto NXTARG;
+			case 'd':
+				if (--argc <= 0)
+					usage ();
+				datafile = *++argv;
+				dflag = 1;
+				goto NXTARG;
+			case 'e':
+				if (--argc <= 0)
+					usage ();
+				ep = strtoul (*++argv, (char **)&ptr, 16);
+				if (*ptr) {
+					fprintf (stderr,
+						"%s: invalid entry point %s\n",
+						cmdname, *argv);
+					exit (EXIT_FAILURE);
+				}
+				eflag = 1;
+				goto NXTARG;
+			case 'n':
+				if (--argc <= 0)
+					usage ();
+				name = *++argv;
+				goto NXTARG;
+			case 'v':
+				vflag++;
+				break;
+			case 'x':
+				xflag++;
+				break;
+			default:
+				usage ();
+			}
+		}
+NXTARG:		;
+	}
+
+	if ((argc != 1) || ((lflag ^ dflag) == 0))
+		usage();
+
+	if (!eflag) {
+		ep = addr;
+		/* If XIP, entry point must be after the U-Boot header */
+		if (xflag)
+			ep += sizeof(image_header_t);
+	}
+
+	/*
+	 * If XIP, ensure the entry point is equal to the load address plus
+	 * the size of the U-Boot header.
+	 */
+	if (xflag) {
+		if (ep != addr + sizeof(image_header_t)) {
+			fprintf (stderr,
+				"%s: For XIP, the entry point must be the load addr + %lu\n",
+				cmdname,
+				(unsigned long)sizeof(image_header_t));
+			exit (EXIT_FAILURE);
+		}
+	}
+
+	imagefile = *argv;
+
+	if (lflag) {
+		ifd = open(imagefile, O_RDONLY|O_BINARY);
+	} else {
+		ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
+	}
+
+	if (ifd < 0) {
+		fprintf (stderr, "%s: Can't open %s: %s\n",
+			cmdname, imagefile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	if (lflag) {
+		int len;
+		char *data;
+		/*
+		 * list header information of existing image
+		 */
+		if (fstat(ifd, &sbuf) < 0) {
+			fprintf (stderr, "%s: Can't stat %s: %s\n",
+				cmdname, imagefile, strerror(errno));
+			exit (EXIT_FAILURE);
+		}
+
+		if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
+			fprintf (stderr,
+				"%s: Bad size: \"%s\" is no valid image\n",
+				cmdname, imagefile);
+			exit (EXIT_FAILURE);
+		}
+
+		ptr = mmap(0, sbuf.st_size,
+					    PROT_READ, MAP_SHARED, ifd, 0);
+		if ((caddr_t)ptr == (caddr_t)-1) {
+			fprintf (stderr, "%s: Can't read %s: %s\n",
+				cmdname, imagefile, strerror(errno));
+			exit (EXIT_FAILURE);
+		}
+
+		/*
+		 * create copy of header so that we can blank out the
+		 * checksum field for checking - this can't be done
+		 * on the PROT_READ mapped data.
+		 */
+		memcpy (hdr, ptr, sizeof(image_header_t));
+
+		if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+			fprintf (stderr,
+				"%s: Bad Magic Number: \"%s\" is no valid image\n",
+				cmdname, imagefile);
+			exit (EXIT_FAILURE);
+		}
+
+		data = (char *)hdr;
+		len  = sizeof(image_header_t);
+
+		checksum = ntohl(hdr->ih_hcrc);
+		hdr->ih_hcrc = htonl(0);	/* clear for re-calculation */
+
+		if (crc32 (0, (unsigned char *)data, len) != checksum) {
+			fprintf (stderr,
+				"%s: ERROR: \"%s\" has bad header checksum!\n",
+				cmdname, imagefile);
+			exit (EXIT_FAILURE);
+		}
+
+		data = (char *)(ptr + sizeof(image_header_t));
+		len  = sbuf.st_size - sizeof(image_header_t) ;
+
+		if (crc32 (0, (unsigned char *)data, len) != ntohl(hdr->ih_dcrc)) {
+			fprintf (stderr,
+				"%s: ERROR: \"%s\" has corrupted data!\n",
+				cmdname, imagefile);
+			exit (EXIT_FAILURE);
+		}
+
+		/* for multi-file images we need the data part, too */
+		print_header ((image_header_t *)ptr);
+
+		(void) munmap((void *)ptr, sbuf.st_size);
+		(void) close (ifd);
+
+		exit (EXIT_SUCCESS);
+	}
+
+	/*
+	 * Must be -w then:
+	 *
+	 * write dummy header, to be fixed later
+	 */
+	memset (hdr, 0, sizeof(image_header_t));
+
+	if (write(ifd, hdr, sizeof(image_header_t)) != sizeof(image_header_t)) {
+		fprintf (stderr, "%s: Write error on %s: %s\n",
+			cmdname, imagefile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	if (opt_type == IH_TYPE_MULTI || opt_type == IH_TYPE_SCRIPT) {
+		char *file = datafile;
+		uint32_t size;
+
+		for (;;) {
+			char *sep = NULL;
+
+			if (file) {
+				if ((sep = strchr(file, ':')) != NULL) {
+					*sep = '\0';
+				}
+
+				if (stat (file, &sbuf) < 0) {
+					fprintf (stderr, "%s: Can't stat %s: %s\n",
+						cmdname, file, strerror(errno));
+					exit (EXIT_FAILURE);
+				}
+				size = htonl(sbuf.st_size);
+			} else {
+				size = 0;
+			}
+
+			if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
+				fprintf (stderr, "%s: Write error on %s: %s\n",
+					cmdname, imagefile, strerror(errno));
+				exit (EXIT_FAILURE);
+			}
+
+			if (!file) {
+				break;
+			}
+
+			if (sep) {
+				*sep = ':';
+				file = sep + 1;
+			} else {
+				file = NULL;
+			}
+		}
+
+		file = datafile;
+
+		for (;;) {
+			char *sep = strchr(file, ':');
+			if (sep) {
+				*sep = '\0';
+				copy_file (ifd, file, 1);
+				*sep++ = ':';
+				file = sep;
+			} else {
+				copy_file (ifd, file, 0);
+				break;
+			}
+		}
+	} else {
+		copy_file (ifd, datafile, 0);
+	}
+
+	/* We're a bit of paranoid */
+#if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
+	(void) fdatasync (ifd);
+#else
+	(void) fsync (ifd);
+#endif
+
+	if (fstat(ifd, &sbuf) < 0) {
+		fprintf (stderr, "%s: Can't stat %s: %s\n",
+			cmdname, imagefile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	ptr = mmap(0, sbuf.st_size,
+				    PROT_READ|PROT_WRITE, MAP_SHARED, ifd, 0);
+	if (ptr == MAP_FAILED) {
+		fprintf (stderr, "%s: Can't map %s: %s\n",
+			cmdname, imagefile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	hdr = (image_header_t *)ptr;
+
+	checksum = crc32 (0,
+			  (unsigned char *)(ptr + sizeof(image_header_t)),
+			  sbuf.st_size - sizeof(image_header_t)
+			 );
+
+	/* Build new header */
+	hdr->ih_magic = htonl(IH_MAGIC);
+	hdr->ih_time  = htonl(sbuf.st_mtime);
+	hdr->ih_size  = htonl(sbuf.st_size - sizeof(image_header_t));
+	hdr->ih_load  = htonl(addr);
+	hdr->ih_ep    = htonl(ep);
+	hdr->ih_dcrc  = htonl(checksum);
+	hdr->ih_os    = opt_os;
+	hdr->ih_arch  = opt_arch;
+	hdr->ih_type  = opt_type;
+	hdr->ih_comp  = opt_comp;
+
+	strncpy((char *)hdr->ih_name, name, IH_NMLEN);
+
+	checksum = crc32(0,(unsigned char *)hdr,sizeof(image_header_t));
+
+	hdr->ih_hcrc = htonl(checksum);
+
+	print_header (hdr);
+
+	(void) munmap((void *)ptr, sbuf.st_size);
+
+	/* We're a bit of paranoid */
+#if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
+	(void) fdatasync (ifd);
+#else
+	(void) fsync (ifd);
+#endif
+
+	if (close(ifd)) {
+		fprintf (stderr, "%s: Write error on %s: %s\n",
+			cmdname, imagefile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	exit (EXIT_SUCCESS);
+}
+
+static void
+copy_file (int ifd, const char *datafile, int pad)
+{
+	int dfd;
+	struct stat sbuf;
+	unsigned char *ptr;
+	int tail;
+	int zero = 0;
+	int offset = 0;
+	int size;
+
+	if (vflag) {
+		fprintf (stderr, "Adding Image %s\n", datafile);
+	}
+
+	if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
+		fprintf (stderr, "%s: Can't open %s: %s\n",
+			cmdname, datafile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	if (fstat(dfd, &sbuf) < 0) {
+		fprintf (stderr, "%s: Can't stat %s: %s\n",
+			cmdname, datafile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	ptr = (unsigned char *)mmap(0, sbuf.st_size,
+				    PROT_READ, MAP_SHARED, dfd, 0);
+	if (ptr == (unsigned char *)MAP_FAILED) {
+		fprintf (stderr, "%s: Can't read %s: %s\n",
+			cmdname, datafile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	if (xflag) {
+		unsigned char *p = NULL;
+		/*
+		 * XIP: do not append the image_header_t at the
+		 * beginning of the file, but consume the space
+		 * reserved for it.
+		 */
+
+		if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
+			fprintf (stderr,
+				"%s: Bad size: \"%s\" is too small for XIP\n",
+				cmdname, datafile);
+			exit (EXIT_FAILURE);
+		}
+
+		for (p=ptr; p < ptr+sizeof(image_header_t); p++) {
+			if ( *p != 0xff ) {
+				fprintf (stderr,
+					"%s: Bad file: \"%s\" has invalid buffer for XIP\n",
+					cmdname, datafile);
+				exit (EXIT_FAILURE);
+			}
+		}
+
+		offset = sizeof(image_header_t);
+	}
+
+	size = sbuf.st_size - offset;
+	if (write(ifd, ptr + offset, size) != size) {
+		fprintf (stderr, "%s: Write error on %s: %s\n",
+			cmdname, imagefile, strerror(errno));
+		exit (EXIT_FAILURE);
+	}
+
+	if (pad && ((tail = size % 4) != 0)) {
+
+		if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
+			fprintf (stderr, "%s: Write error on %s: %s\n",
+				cmdname, imagefile, strerror(errno));
+			exit (EXIT_FAILURE);
+		}
+	}
+
+	(void) munmap((void *)ptr, sbuf.st_size);
+	(void) close (dfd);
+}
+
+void
+usage ()
+{
+	fprintf (stderr, "Usage: %s -l image\n"
+			 "          -l ==> list image header information\n"
+			 "       %s [-x] -A arch -O os -T type -C comp "
+			 "-a addr -e ep -n name -d data_file[:data_file...] image\n",
+		cmdname, cmdname);
+	fprintf (stderr, "          -A ==> set architecture to 'arch'\n"
+			 "          -O ==> set operating system to 'os'\n"
+			 "          -T ==> set image type to 'type'\n"
+			 "          -C ==> set compression type 'comp'\n"
+			 "          -a ==> set load address to 'addr' (hex)\n"
+			 "          -e ==> set entry point to 'ep' (hex)\n"
+			 "          -n ==> set image name to 'name'\n"
+			 "          -d ==> use image data from 'datafile'\n"
+			 "          -x ==> set XIP (execute in place)\n"
+		);
+	exit (EXIT_FAILURE);
+}
+
+static void
+print_header (image_header_t *hdr)
+{
+	time_t timestamp;
+	uint32_t size;
+
+	timestamp = (time_t)ntohl(hdr->ih_time);
+	size = ntohl(hdr->ih_size);
+
+	printf ("Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
+	printf ("Created:      %s", ctime(&timestamp));
+	printf ("Image Type:   "); print_type(hdr);
+	printf ("Data Size:    %d Bytes = %.2f kB = %.2f MB\n",
+		size, (double)size / 1.024e3, (double)size / 1.048576e6 );
+	printf ("Load Address: 0x%08X\n", ntohl(hdr->ih_load));
+	printf ("Entry Point:  0x%08X\n", ntohl(hdr->ih_ep));
+
+	if (hdr->ih_type == IH_TYPE_MULTI || hdr->ih_type == IH_TYPE_SCRIPT) {
+		int i, ptrs;
+		uint32_t pos;
+		uint32_t *len_ptr = (uint32_t *) (
+					(unsigned long)hdr + sizeof(image_header_t)
+				);
+
+		/* determine number of images first (to calculate image offsets) */
+		for (i=0; len_ptr[i]; ++i)	/* null pointer terminates list */
+			;
+		ptrs = i;		/* null pointer terminates list */
+
+		pos = sizeof(image_header_t) + ptrs * sizeof(long);
+		printf ("Contents:\n");
+		for (i=0; len_ptr[i]; ++i) {
+			size = ntohl(len_ptr[i]);
+
+			printf ("   Image %d: %8d Bytes = %4d kB = %d MB\n",
+				i, size, size>>10, size>>20);
+			if (hdr->ih_type == IH_TYPE_SCRIPT && i > 0) {
+				/*
+				 * the user may need to know offsets
+				 * if planning to do something with
+				 * multiple files
+				 */
+				printf ("    Offset = %08X\n", pos);
+			}
+			/* copy_file() will pad the first files to even word align */
+			size += 3;
+			size &= ~3;
+			pos += size;
+		}
+	}
+}
+
+
+static void
+print_type (image_header_t *hdr)
+{
+	printf ("%s %s %s (%s)\n",
+		put_arch (hdr->ih_arch),
+		put_os   (hdr->ih_os  ),
+		put_type (hdr->ih_type),
+		put_comp (hdr->ih_comp)
+	);
+}
+
+static char *put_arch (int arch)
+{
+	return (put_table_entry(arch_name, "Unknown Architecture", arch));
+}
+
+static char *put_os (int os)
+{
+	return (put_table_entry(os_name, "Unknown OS", os));
+}
+
+static char *put_type (int type)
+{
+	return (put_table_entry(type_name, "Unknown Image", type));
+}
+
+static char *put_comp (int comp)
+{
+	return (put_table_entry(comp_name, "Unknown Compression", comp));
+}
+
+static char *put_table_entry (table_entry_t *table, char *msg, int type)
+{
+	for (; table->val>=0; ++table) {
+		if (table->val == type)
+			return (table->lname);
+	}
+	return (msg);
+}
+
+static int get_arch(char *name)
+{
+	return (get_table_entry(arch_name, "CPU", name));
+}
+
+
+static int get_comp(char *name)
+{
+	return (get_table_entry(comp_name, "Compression", name));
+}
+
+
+static int get_os (char *name)
+{
+	return (get_table_entry(os_name, "OS", name));
+}
+
+
+static int get_type(char *name)
+{
+	return (get_table_entry(type_name, "Image", name));
+}
+
+static int get_table_entry (table_entry_t *table, char *msg, char *name)
+{
+	table_entry_t *t;
+	int first = 1;
+
+	for (t=table; t->val>=0; ++t) {
+		if (t->sname && strcasecmp(t->sname, name)==0)
+			return (t->val);
+	}
+	fprintf (stderr, "\nInvalid %s Type - valid names are", msg);
+	for (t=table; t->val>=0; ++t) {
+		if (t->sname == NULL)
+			continue;
+		fprintf (stderr, "%c %s", (first) ? ':' : ',', t->sname);
+		first = 0;
+	}
+	fprintf (stderr, "\n");
+	return (-1);
+}